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Method for Optimal Analytical Approximation of Time Samplings in Analyzing Nonstationary Periodic Signals

  • ATMOSPHERIC AND AEROACOUSTICS
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Abstract

An algorithm has been developed for determining the frequency and amplitude of the harmonic components of a weakly nonstationary acoustic signal, which also contains random noise and drift of the constant component. The algorithm was tested on a signal simulating flight of an aircraft over a measurement point. For a model source simulating a the propeller of UAV, the possibility of determining the harmonic amplitudes of a propeller with varying revolutions and under noise interference conditions was demonstrated using the unique scientific installation the TsAGI AC-2 anechoic chamber with flow.

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Funding

The experimental part of the study was carried out in the TsAGI AC-2 anechoic chamber with flow facility, upgraded with the financial support of the Ministry of Science and Higher Education of the Russian Federation under agreement no. 075-15-2022-1036.

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Authors and Affiliations

  1. LLC Ekofizika, 129085, Moscow, Russia

    A. N. Vishnyakov

  2. Central Aerohydrodynamic Institute (TsAGI), 125040, Moscow, Russia

    S. Yu. Makashov

Authors
  1. A. N. Vishnyakov
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  2. S. Yu. Makashov
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Correspondence to S. Yu. Makashov.

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Vishnyakov, A.N., Makashov, S.Y. Method for Optimal Analytical Approximation of Time Samplings in Analyzing Nonstationary Periodic Signals. Acoust. Phys. 69, 173–181 (2023). https://doi.org/10.1134/S1063771023700586

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  • DOI: https://doi.org/10.1134/S1063771023700586

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